[PD] Arduino, any feedback to help me choose the model?

[Pierre Massat]

Thank you both for your replies.
I don't think i will need multiplexing.
@Pedro : what do you mean by "fluctuate a little"? This could be anoying if
they fluctuate too much, because i wanted to use a pot to control a delay
length (you can hear gliches if the delay length jumps from one value to
another rapidly).

I think i will get the Mega. It's not too expensive (probably quite cheap
actually), and i could use it for something else later on.
On last question : is it powered by USB, or do i need a power adaptor?

Thanks again for your help!

Pierre

2011/4/10 Pedro Lopes <pedro.lopes at ist.utl.pt>

> Depends on what you want the leds to do. If you simply want them to shine
> when buttons are pressed, dont waste arduino code on that. But if you want
> them to blink or react to the controller state (hence code) they'll have to
> be controlled via some digital pins (in output state) as Goyard stated, as
> thus you are requesting more pins (maybe the mega as I say in my first
> message).
>
> Althought: multiplexing LEDs is very easy. 3 outputs can control 8 leds and
> so forth. But more coding/control effort.
>
>
> On Sun, Apr 10, 2011 at 3:12 PM, Charles Goyard <cg at fsck.fr> wrote:
>
>> Pierre Massat wrote:
>> >
>> > I also saw that the board could power LEDs. This could be very
>> interesting,
>>
>> Yes, but the Digital Input are "shared" with the digital outputs. So if
>> you put a button on a line, you cannot put a led too. You have up to 12
>> inputs/outputs IN TOTAL. You choose in your program if you want
>> something to be a input or an output.
>>
>> Given your questions (no offense), I would go with a Mega board and not
>> bother with multiplexing yet. That way you get a fully assembled,
>> ready-to-use 50 inputs/outputs for your leds and buttons, + 16 analog
>> inputs, with plenty of program space.
>>
>> --
>> Charles
>>
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>
>
>
> --
> Pedro Lopes (MSc)
> contact: pedro.lopes at ist.utl.pt
> website: http://web.ist.utl.pt/Pedro.Lopes /
> http://pedrolopesresearch.wordpress.com/ |
> http://twitter.com/plopesresearch
>
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